<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	private $_id;
	public function authenticate()
	{
		/**
		 * 用户名密码校验
		 * @var unknown_type
		 */
		//find()没找到返回null
		//findAll()没找到会返回空数组
		
		
		$user_model = User::model() -> find('user_name=:name',array(':name'=>$this->username));
		$name = "'".$this->username."'";
		$user_id = User::model()->getIdByName($name);
		$this->_id=$user_id[0]['user_id'];

		//用户名不存在
		if($user_model === null){
			$this->errorCode = self::ERROR_USERNAME_INVALID;
			return false;
		//判断密码是否正确
		}else if($user_model->user_password !== sha1($this->password)){
			$this->errorCode = self::ERROR_PASSWORD_INVALID;
			return false;
		}else{
			$this->errorCode=self::ERROR_NONE;
			return true;
		}
		
//		if(!isset($users[$this->username]))
//			$this->errorCode=self::ERROR_USERNAME_INVALID;
//		elseif($users[$this->username]!==$this->password)
//			$this->errorCode=self::ERROR_PASSWORD_INVALID;
//		else
//			$this->errorCode=self::ERROR_NONE;
//		return !$this->errorCode;
	}
	
	public function getId(){
	return $this->_id;}
}